Aerosol optical properties based on ground measurements over the Chinese Yangtze Delta Region
Aerosol optical properties based on ground measurements over the Chinese Yangtze Delta Region
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基于中国长江三角洲地区地面测量的气溶胶光学特性
DOI：
10.1016/j.atmosenv.2010.04.013
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发表时间：
2010-07
影响因子：
5
通讯作者：
中科院分区：
文献类型：
--
作者：
利用2007 ~ 2008年中国长江三角洲地区5个站点的Cimel太阳光度计资料，分析比较了大气气溶胶光学深度（AOD）和埃指数的变化特征。临安和中山大学的同时测量显示，AOD在所有波长的一致性非常高。各波长的埃指数和AOD差异均小于0.02。浦东、太湖和临安地区440nm AOD平均值分别为0.74±0.43、0.85±0.46和0.89±0.46。各组的埃氏指数平均值分别为1.27±0.30、1.20±0.28和1.32±0.35。浦东地区月平均AOD变化呈单峰分布，7月最大值（AOD440nm1.26±0.61），1月最小值（AOD440nm0.50±0.27）。而太湖和临安月平均AOD的变化呈双峰型分布。太湖的AOD峰值出现在7月（AOD440nm1.41±0.49）和9月（AOD440nm1.22±0.52）。临安地区AOD峰值分别出现在6月（AOD440nm1.17±0.69）和9月（AOD440nm1.28±0.46）。在浦东、太湖和临安，AOD主要分布在0.30 ~ 0.90（68%）、0.30 ~ 1.20（75%）和0.30 ~ 1.20（~ 75%）之间。在浦东、太湖和临安，Angstrom指数主要集中在1.10 ~ 1.60（75%）、1.10 ~ 1.50（63%）和1.20 ~ 1.60、50%（50%）之间。同步观测结果表明，在1020nm、870nm、670nm、500nm和440nm波段，浦东的AOD分别比东滩的AOD大0.03、0.03、0.04、0.07和0.08。浦东、太湖和临安的同步观测结果表明，3个站点的AOD水平较高，440nm的平均值分别为0.68、0.73和0.78。浦东、太湖、临安和东滩地区MODIS反演AOD值与地面实测AOD值的r2值吻合较好，r2值在0.68 ~ 0.79之间。与浦东、太湖和东滩的地面测量结果相比，MODIS结果被高估了，但临安的情况例外。气溶胶光学特性与浦东风向测量的分析结果表明，来自东方的风速与较低的AOD观测值相关。背向轨迹分析表明，浦东地区50%以上的气团来自海区，临安地区背向轨迹分布较为均匀。
The characteristics of Aerosol Optical Depth (AOD) and Angstrom exponent were analyzed and compared using Cimel sunphotometer data from 2007 to 2008 at five sites located in the Yangtze River Delta region of China. The simultaneous measurements between Lin’an and ZFU showed a very high consistency of AOD at all wavelengths. The differences are less than 0.02 for Angstrom exponent and AOD at all wavelengths. The mean values of AOD at 440nm at the Pudong, Taihu and Lin’an were about 0.74±0.43, 0.85±0.46, and 0.89±0.46, respectively. The mean values of Angstrom exponents were about 1.27±0.30, 1.20±0.28 and 1.32±0.35, respectively. The variation of monthly averaged AOD over Pudong showed a single peak distribution, with the maximum value occurring in July (AOD440nm1.26±0.61) and minimum in January (AOD440nm0.50±0.27). However, the variations of monthly averaged AOD at Taihu and Lin’an showed a bi-modal distribution. There were peak values of AOD occurring in July (AOD440nm1.41±0.49) and September (AOD440nm1.22±0.52) for Taihu. For Lin’an, the two peak values of AOD occurred in June (AOD440nm1.17±0.69) and September (AOD440nm1.28±0.46). The AOD accumulated mainly between 0.30–0.90(68%), 0.30–1.20(75%) and 0.30–1.20 (∼75%) at Pudong, Taihu, and Lin’an, respectively. The Angstrom exponent accumulated mainly between 1.10–1.60 (75%), 1.10–1.50 (63%) and 1.20–1.60, 50% (50%) at Pudong, Taihu, and Lin’an, respectively. The synchronized observation showed that the AOD at Pudong was larger than those at Dongtan by 0.03, 0.03, 0.04, 0.07, and 0.08 at wavelengths of 1020nm, 870nm, 670nm, 500nm and 440nm, respectively. The synchronized observations at Pudong, Taihu and Lin’an showed that the three stations had high level AOD with means at 440nm about 0.68, 0.73, and 0.78, respectively. The relationship between MODIS retrieved and ground-based measured AOD shows good agreement with R2ranging from 0.68 to 0.79 at Pudong, Taihu, Lin’an and Dongtan. The MODIS results were overestimated comparing the ground measurements at Pudong, Taihu, and Dongtan but exceptional at Lin’an. The analysis results between aerosol optical properties and wind measurement at Pudong showed that the wind speed from the east correlates with the lower observed AOD. The back trajectory analysis indicates that more than 50% airmasses were from the marine area at Pudong, while back trajectories distribution is relatively homogeneous at Lin’an.
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影响因子：
4.4
作者：
Holben, BN;Tanré, D;Zibordi, G
通讯作者：
Zibordi, G
影响因子：
--
作者：
C. Ran;Xiao Zhong-yong
通讯作者：
C. Ran;Xiao Zhong-yong
影响因子：
5
作者：
D. Pack;G. Ferber;J. Heffter;K. Telegadas;J. Angell;W. H. Hoecker;L. Machta
通讯作者：
D. Pack;G. Ferber;J. Heffter;K. Telegadas;J. Angell;W. H. Hoecker;L. Machta
DOI：
--
发表时间：
2009
期刊：
Journal of Fudan University
影响因子：
--
作者：
Z. Hao
通讯作者：
Z. Hao
影响因子：
5.2
作者：
Che, Huizheng;Zhang, Xiaoye;Qu, John J.
通讯作者：
Qu, John J.